Swifty Industries is a leading manufacturer of baseballs. Each baseball requires 5 minutes of direct labor time to complete. Harker used Swifty used 36,260 direct labor hours in July to produce 432,600 baseballs. Swifty's standard labor rate is $13 per direct labor hour, and the actual labor rate in July was $11.29. Calculate Swifty's direct labor efficiency variance for July. (If variance is zero, select "Not Applicable" and enter O for the amounts.) Direct labor efficiency variance